<template>
  <div class="swiper-container">
    <div class="swiper-wrapper">
      <div
        class="swiper-slide"
        v-for="(skuImage,index) in skuImageList"
        :key="skuImage.id"
      >
        <img
          :src="skuImage.imgUrl"
          :class="{ active: activeImageIndex ===index}"
          @click="changeActiveImage(index)"
        />
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>
import Swiper from "swiper";
export default {
  name: "ImageList",
  props: {
    skuImageList: {
      type: Array,
      //数组,对象设置默认值应该使用工厂函数形式
      default: () => [],
    },
  },

  data() {
    return {
      //选中的图片下标
      activeImageIndex: 0,
    };
  },

  watch: {
    //轮播图
    skuImageList() {
      this.$nextTick(() => {
        new Swiper(".swiper-container", {
          //每页显示个数
          slidesPerView: 3,
          //每次滚动个数(每组个数)
          slidesPerGroup: 2,
          // 如果需要前进后退按钮
          navigation: {
            nextEl: ".swiper-button-next",
            prevEl: ".swiper-button-prev",
          },
        });
      });
    },
  },

  methods: {
    //切换小图并通知ImagesList组件切换大图
    changeActiveImage(index) {
      this.activeImageIndex =index
      this.$bus.$emit('changeCheckImage',index)
    },
  },
};
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }

      // &:hover {
      //   border: 2px solid #f60;
      //   padding: 1px;
      // }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;
    &::after {
      font-size: 12px;
    }
  }
}
</style>